Type-writing machine.



F. A. YOUNG.

TYPE WRITING MACHINE.

APPLICATION FILED AUG.29| 1911.

1,169,313. Patented Jan. 25, 1916.

' 2 SHEET SSHEET 1.

FIG. 2.

INVENTOR:

WITNESSES:

AKA/l W ATTORNEY F. A. YOUNG.

TYPE WRITING MACHINE.

VAPPLICATION FILED AUG.29, 1911.

Patented J an. 25, 1916.

2 SHEETSSHEET 2- 111v ENOR:

BY I

ATTORNE WITN ESShS: L/ r 1 orrn s rrtrns FRANK AQYOUNG, DF NEW YORK, N. Y., ASSIGN'OR TO UNDEIRWGOI)v TYPE'WEITEB COMPANY, OF NEXV YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Jan. 25, 191%.

Application filed August 29, 1911. Serial No. 846,579.

To all whom it may concern Be it known that I, FRANK A. YOUNG, a citizen of the United States, residing in New York, in the county of New York and State of New York. have invented certain new and useful Improvements in Type-\Vriting hTHClHIIES, of which the following is a specs fication.

This invention relates to.a new and improved shift lock for locking a shift or shift member against accidental movement.

An object of this invention is to obtain in a typewriter a perfect alinement of the characters. This may 0* attained by pro viding a positive lock for securing both ends of a shift or shift member against movement in the two positions corespondineto those necessary for the purpose of obtaining an impression of upper and lower case characters.

A further object ofthis invention is to permit in a typewriter the actuation of one shift key without disturbing the other shift key. This object may be attained by connecting the shift keys to the shifting mechanism in such a way that the movements of the shift keys in one direction may be trans mitted to the shifting mechanism. but es that the shift keys will be independentof the movement of the shifting' mechanlsin. It isthc usual practice to merely lock one end of the platen frame in its upper case position. which permits especially if there .is any looseless of the parts or spring in themetal. the unlocked end of the carriage to move up and down a slightamount. This however is sutiicient to produce an irregularity in the alinement of the characters when impressed on the sheet on the platen. This ohjectionis eliminated in the present invention by not only locking one. but both ends of the shiftable platen frame in a rigid manner.

Other features and advantages wil hereinafter appear.

Reference may be had to the accom'pan v ing drawings forming a part of this specification in which like reference characters denote corresponding parts in the several views, and in which Figure 1 isa'frag'mentary view in side elevation. is a fragmentary view in front elevation, with parts broken away.

[to show the underlying structure. Fig. 3

is a top plan view, with parts broken away, to show the underlying structure.

Referring more particularly to the separate parts of this invention illustrated in the drawings as applied to the Underwood machine, 245 represents the usual character key lever which operates a sub-lever 27 and type bar 28. so as to swing the latter upwardly and rearwardly against the front side of a platen 29 mounted on the shift frame 21 of the carriage 22. The frame 21 may be supported on the carriage so that it can move up and down, as for example, by having studs 30 thereon which rest in bear ings provided in hooks 31 pivot-ally mounted on the carriage 22. as at Shift keys 1 are connected to key levers 2 loosely pivoted on studs 3. Sub-levers i, also pivoted on said studs, maybe depressed by the key levers 2. h providing projections or lugs on the key levers. The keylevers 2 may be returned by springs 6.

The rear end of each of the subdevers is provided with a pivot pin '7 which engages in a slot. 8 on one arm 9. of each locking lever10. The latter are fast on a shaft 11 )YlllCll is rotatably mounted in brack ts 1:2.

The shaft- 11 also forms a guide for links 13. which are pivotally connected at their upper ends to a shift member 1% at opposite sides thereof. The means of connection between the shaft 11 and each link 13 ispref erablv a slot in each link through which the shaft 11 extends. so that each link 13 can move up and down. and thus carry with it the shift member ll. This movement may be obtained by providing'in-each locking lever l0. a slot 15; the margins of which are. in the form of lifting and 17. which engage a stud 18 on each link 13 extending into said slot 15.

It will be noted that the slots 15 are provided at each end with offset portions 19 and 20. which form sockets into which the studs 18 can slip. so as to lock the levers 10 and links 13 against accidental relative movement. These sockets. it will be noted. are

formed on opposite sides of the slots 15 and and lowering cams 16 change from lower to upper case letters, and vice versa. This might be the,segment carrying the striking type bars, or aszshown in this instance, might be the mechanism for lifting the platen frame, indicated at 21, relatively to the carriage indicated at 22, and shown in the'form of a lifting rail 23 connected to and movable by the usual rail levers 24. It is therefore not intended to limit the term shift member to a platen frame lifting mechanism, but to such a mechanismas may be manipulated to change from lower to upper case letters, and vice' versa. I

It will thus be seen that when either of the I shift keys is depressed, it will actuate the '11, so that they swing from the full-linecorresponding sub-lever without disturbing the position of the other shift key, and through the actuation of the sub-lever, will manipulate both of the locking levers inasmuch as they are both secured to the shaft The device forms a positive lock, which cannot he accidentally broken -by the 1iggling 0f the shift; the edges of the sockets being dead or dwell edges as distinguished from camming edges, the links (when engaging the sockets) being incapable of stirring the arms 10. The links are held from displacement at their lower ends by the shaft 11,

It is therefore evident in view of thefact that a locking mechanism is provided at each end of the shift, that both ends thereof will be rigidly held against accidental movement, as will the parts connected thereto.

Springs 33 may be secured to the sub levers for returning them to their normal positions and simultaneously swinging the locking levers 10,59 as to permit the studs 18],' t,ochange from the sockets or rests 19 to t e sockets or rests 20. Y

T I e links 13 may be pivoted to the fronts ,and ,tops of the raillevers 24 in close juxtaposition to the shifting rail 23, whereby the Jail itself will be held rigidly against movement.

While I have shown one embodiment of my invention, .1 do not wish to be limited to the specific details thereof, but desire to be protected in the various changes, alterations and modifications, which may come within ,thh scope of the invention.

Having thus described my invention, I claim: 1

Ir The combination with a shift frame, of a shift frame key lever, a link pivotally connected to said shift frame, a stud on said link, alocking lever having a slot therein througlf-v which said stud extends, a pivot said shift frame from a lower positL;

shaft for said locking lever, said link having a slot therein through which said pivot shaft extends, and a sub-lever actuated by saidkey lever for actuating said locking lever.

2. The combination with a shift frame, of

a shift frame key lever, a link pivotally connected to said shift fran1e,a stud on said link, a locking lever having a slot therein through which said stud extends, a pivot shaft for said locking lever, said link having a slot therein through which said pivot shaft extends, and a sub-lever actuated by said key lever for actuating said locking lever} said first-mentioned slot having offset poitions forming sockets or rests into which said stud may slip to lock said link aga nst movement relatively thereto. i

The combination with a shift frame, of

a shift frame key lever, a'link pivotally connected to said shift frame, a stud on slnd link, a locking lever having a slot therein through which said stud extends, a pivot shaft for said locking lever, said link having a slot therein through which said pivot shaft extends, and a sub-lever actuated by said key lever for actuating said locking. lever; said firstunentloned slot having offset portions located adjacent each endthereof, whereby said stud can slip into the sockets thus formed to prevent up and down movement of said shift frame in either position thereof.

4. The combination with a shift frame, of

a shift frame key lever, a pivotally mounted locking lever operatively connected to said shift key lever so as to be actuated thereby,

said locking lever being movable from right to left'and vice versa, whereby the marglnal edges of said slot will cam said stud up and down and thus manipulate saidshift frame up and down, the sockets of said slot being located in alinement at each end of the swing of said locking lever with the pivot point of said locking lever and the pivot point of said link, so as to form a dead center lock.

5. The-combination with a shift frame pivoted on. the frame of the machine, of a: pair of links pivotally connected to said shift frame near the ends thereof, a stud on each of said links, a pair of levers for actuating said links, said levers being sooured together, so as to act in unison, and one or more shi ft key levers opcratively connected to said lirst-n'icntioncd levers.

i The comb' ation with a shift frame of a-shilt frame key lever for manipulating higher position, a transverse shaft, and a camming and locking mechanism on each end of said shaft for each end of said shift frame, acting to operate and then lock said shift frame against up and down movement inboth positions thereof,'whereby both ends of said shift frame will be held rigidly against accidental movement.

7. The combination with a shift frame, of

a pair of links connected to said shift frame.

ment of the other shift key lever.

7 8. The combination with a shift frame, of a pair of links connected to said shift frame, a stud on each of said links, a pair of levers swinging a pair of cams embracing said studs for actuating and locking said links, said levers being rigidlyconnected together-so as to move in unison, a plurality of shift key levers operatively connected to Said first mentioned levers, so that the actuation of either one of said shift key levers will operate both of said first mentioned levers independent of any movement of the other shift key lever, and spring means for returning said first-mentioned levers to their original positions-after having been actuated by said shift key levers.

9. The combination with a pivoted shift frame, of links pivoted to said shift frame at each end embracing and sliding on a shaft on which are fixed arms, slots in said arms in which ride studs on said links, projections on said slots for locking said studs at the end of their travel, and keys turning said shaft to operate said shift fra1ne.'

10. The combination with a substantially horizontal arm, of a carriage shifted by said arm, said arm having a depending, slotted link, a shaft embraced by the slot in said link, slotted arms on said shaft, studs on said'link engaged by the slots in said arms,-

keys to turn said shaft to move said arms to shift said studs, and projections to lock said studs at the ends of the slots.

11. The combination with a pivoted shift frame extending across the machine, of a pivoted link for moving each end of the shift frame, guides, for the free ends of the links, locking means for locking each link simultaneously, keys for operating the links, and return means for normally keeping the shift frame at one position. I

FRANK A. YOUNG. Witnesses:

PAUL ZIRON, B. GOLDBERG. 

